﻿#region Header
// ------------------------ Licence / Copyright ------------------------
// 
// ScrumTable for Scrum Meeting Support
// Copyright © HSR - Hochschule für Technik Rapperswil
// All Rights Reserved
// 
// Author:
//  Michael Gfeller Silvan Gehrig Patrick Boos
// 
// ---------------------------------------------------------------------
#endregion

#region Usings

using System;
using System.Collections;
using System.Drawing;
using System.Globalization;
using System.Windows;
using System.Windows.Data;
using System.Windows.Media.Imaging;
using System.Drawing.Imaging;
using System.Windows.Media;
using ScrumTable.UI.View.Util;
using PixelFormat = System.Windows.Media.PixelFormat;

#endregion

namespace ScrumTable.UI.View.Converter
{

    /// <summary>
    /// Converts a bitmap into a imagesource
    /// </summary>
    [ValueConversion(typeof(Bitmap), typeof(BitmapSource))]
    public class ConverterBitMapToImageSource : IValueConverter
    {

        #region Declarations
        //--------------------------------------------------------------------
        // Declarations
        //--------------------------------------------------------------------
        private static readonly Hashtable _chachedImage = new Hashtable();

        private static readonly BitmapSource _bitmap = new BitmapImage(new Uri(@"pack://application:,,,/ScrumTable.UI.View;component/Resources/person.gif"));
        #endregion
        
        #region Properties
        //--------------------------------------------------------------------
        // Properties
        //--------------------------------------------------------------------

        #endregion

        #region Constructors / Destructor
        //--------------------------------------------------------------------
        // Constructors / Destructor
        //--------------------------------------------------------------------

        #endregion

        #region Methods
        //--------------------------------------------------------------------
        // Methods
        //--------------------------------------------------------------------
        /// <summary>
        /// Bitmap to ImageSource
        /// </summary>
        /// <param name="value">The value produced by the binding source.</param>
        /// <param name="targetType">The type of the binding target property.</param>
        /// <param name="parameter">The converter parameter to use.</param>
        /// <param name="culture">The culture to use in the converter.</param>
        /// <returns>
        /// A converted value. If the method returns null, the valid null value is used.
        /// </returns>
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value == null)
            {
                _bitmap.Freeze();
                return _bitmap;
            }
            
            if (_chachedImage.Contains(value))
            {
                return _chachedImage[value];
            }


            var bitmap = BitmapUtil.CreateBitmapSource(((Bitmap)value));
            bitmap.Freeze();            
            _chachedImage.Add(value, bitmap);            
            return bitmap;
        }


       

        /// <summary>
        /// Ist not supported. Throws NotSupportedException.
        /// </summary>
        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotSupportedException();
        }
        #endregion

        #region Events
        //--------------------------------------------------------------------
        // Events
        //--------------------------------------------------------------------

        #endregion


    }
}
